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<li class="navelem"><a class="el" href="dir_374ee6e3281d8312d956f1f155302869.html">aestate</a></li><li class="navelem"><a class="el" href="dir_750b3d80577cce9b9bed1e25acfa02b9.html">ajson</a></li><li class="navelem"><a class="el" href="dir_0ff9c0a1878d33b60c2e08a209ca7aa8.html">sim</a></li>  </ul>
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<div class="title">scanner.py</div>  </div>
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<a href="scanner_8py.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"><a class="line" href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html">    1</a></span>&#160;<span class="stringliteral">&quot;&quot;&quot;JSON token scanner</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="stringliteral">&quot;&quot;&quot;</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="keyword">import</span> re</div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="keyword">from</span> .errors <span class="keyword">import</span> JSONDecodeError</div>
<div class="line"><a name="l00005"></a><span class="lineno"><a class="line" href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#ae8f9e194f9bfc40954802c8d79a3de01">    5</a></span>&#160;<span class="keyword">def </span><a class="code" href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#ae8f9e194f9bfc40954802c8d79a3de01">_import_c_make_scanner</a>():</div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;    <span class="keywordflow">try</span>:</div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;        <span class="keyword">from</span> ._speedups <span class="keyword">import</span> make_scanner</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;        <span class="keywordflow">return</span> make_scanner</div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;    <span class="keywordflow">except</span> ImportError:</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;        <span class="keywordflow">return</span> <span class="keywordtype">None</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"><a class="line" href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#a0dca7c7301a09032951c453effe4f083">   11</a></span>&#160;c_make_scanner = <a class="code" href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#ae8f9e194f9bfc40954802c8d79a3de01">_import_c_make_scanner</a>()</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160; </div>
<div class="line"><a name="l00013"></a><span class="lineno"><a class="line" href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#a039927a1300276da9c5300266dbaebc9">   13</a></span>&#160;__all__ = [<span class="stringliteral">&#39;make_scanner&#39;</span>, <span class="stringliteral">&#39;JSONDecodeError&#39;</span>]</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160; </div>
<div class="line"><a name="l00015"></a><span class="lineno"><a class="line" href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#a2d804b1b9547d780f084e54741575ae7">   15</a></span>&#160;NUMBER_RE = re.compile(</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;    <span class="stringliteral">r&#39;(-?(?:0|[1-9]\d*))(\.\d+)?([eE][-+]?\d+)?&#39;</span>,</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;    (re.VERBOSE | re.MULTILINE | re.DOTALL))</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160; </div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160; </div>
<div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#a77fc0c8e3170a8941797e63c0d559147">   20</a></span>&#160;<span class="keyword">def </span><a class="code" href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#a77fc0c8e3170a8941797e63c0d559147">py_make_scanner</a>(context):</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;    parse_object = context.parse_object</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;    parse_array = context.parse_array</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;    parse_string = context.parse_string</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;    match_number = NUMBER_RE.match</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;    encoding = context.encoding</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;    strict = context.strict</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;    parse_float = context.parse_float</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    parse_int = context.parse_int</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;    parse_constant = context.parse_constant</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;    object_hook = context.object_hook</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;    object_pairs_hook = context.object_pairs_hook</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;    memo = context.memo</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    <span class="keyword">def </span>_scan_once(string, idx):</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;        errmsg = <span class="stringliteral">&#39;Expecting value&#39;</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;        <span class="keywordflow">try</span>:</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;            nextchar = string[idx]</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;        <span class="keywordflow">except</span> IndexError:</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;            <span class="keywordflow">raise</span> <a class="code" href="classaestate_1_1ajson_1_1sim_1_1errors_1_1_j_s_o_n_decode_error.html">JSONDecodeError</a>(errmsg, string, idx)</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160; </div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;        <span class="keywordflow">if</span> nextchar == <span class="stringliteral">&#39;&quot;&#39;</span>:</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;            <span class="keywordflow">return</span> parse_string(string, idx + 1, encoding, strict)</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;        <span class="keywordflow">elif</span> nextchar == <span class="stringliteral">&#39;{&#39;</span>:</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;            <span class="keywordflow">return</span> parse_object((string, idx + 1), encoding, strict,</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;                _scan_once, object_hook, object_pairs_hook, memo)</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;        <span class="keywordflow">elif</span> nextchar == <span class="stringliteral">&#39;[&#39;</span>:</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;            <span class="keywordflow">return</span> parse_array((string, idx + 1), _scan_once)</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;        <span class="keywordflow">elif</span> nextchar == <span class="stringliteral">&#39;n&#39;</span> <span class="keywordflow">and</span> string[idx:idx + 4] == <span class="stringliteral">&#39;null&#39;</span>:</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;            <span class="keywordflow">return</span> <span class="keywordtype">None</span>, idx + 4</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;        <span class="keywordflow">elif</span> nextchar == <span class="stringliteral">&#39;t&#39;</span> <span class="keywordflow">and</span> string[idx:idx + 4] == <span class="stringliteral">&#39;true&#39;</span>:</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;            <span class="keywordflow">return</span> <span class="keyword">True</span>, idx + 4</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;        <span class="keywordflow">elif</span> nextchar == <span class="stringliteral">&#39;f&#39;</span> <span class="keywordflow">and</span> string[idx:idx + 5] == <span class="stringliteral">&#39;false&#39;</span>:</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;            <span class="keywordflow">return</span> <span class="keyword">False</span>, idx + 5</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160; </div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;        m = match_number(string, idx)</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;        <span class="keywordflow">if</span> m <span class="keywordflow">is</span> <span class="keywordflow">not</span> <span class="keywordtype">None</span>:</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;            integer, frac, exp = m.groups()</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;            <span class="keywordflow">if</span> frac <span class="keywordflow">or</span> exp:</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;                res = parse_float(integer + (frac <span class="keywordflow">or</span> <span class="stringliteral">&#39;&#39;</span>) + (exp <span class="keywordflow">or</span> <span class="stringliteral">&#39;&#39;</span>))</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;            <span class="keywordflow">else</span>:</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;                res = parse_int(integer)</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;            <span class="keywordflow">return</span> res, m.end()</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        <span class="keywordflow">elif</span> nextchar == <span class="stringliteral">&#39;N&#39;</span> <span class="keywordflow">and</span> string[idx:idx + 3] == <span class="stringliteral">&#39;NaN&#39;</span>:</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;            <span class="keywordflow">return</span> parse_constant(<span class="stringliteral">&#39;NaN&#39;</span>), idx + 3</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;        <span class="keywordflow">elif</span> nextchar == <span class="stringliteral">&#39;I&#39;</span> <span class="keywordflow">and</span> string[idx:idx + 8] == <span class="stringliteral">&#39;Infinity&#39;</span>:</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;            <span class="keywordflow">return</span> parse_constant(<span class="stringliteral">&#39;Infinity&#39;</span>), idx + 8</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;        <span class="keywordflow">elif</span> nextchar == <span class="stringliteral">&#39;-&#39;</span> <span class="keywordflow">and</span> string[idx:idx + 9] == <span class="stringliteral">&#39;-Infinity&#39;</span>:</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;            <span class="keywordflow">return</span> parse_constant(<span class="stringliteral">&#39;-Infinity&#39;</span>), idx + 9</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;        <span class="keywordflow">else</span>:</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;            <span class="keywordflow">raise</span> <a class="code" href="classaestate_1_1ajson_1_1sim_1_1errors_1_1_j_s_o_n_decode_error.html">JSONDecodeError</a>(errmsg, string, idx)</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160; </div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    <span class="keyword">def </span>scan_once(string, idx):</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;        <span class="keywordflow">if</span> idx &lt; 0:</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;            <span class="comment"># Ensure the same behavior as the C speedup, otherwise</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;            <span class="comment"># this would work for *some* negative string indices due</span></div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;            <span class="comment"># to the behavior of __getitem__ for strings. #98</span></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;            <span class="keywordflow">raise</span> <a class="code" href="classaestate_1_1ajson_1_1sim_1_1errors_1_1_j_s_o_n_decode_error.html">JSONDecodeError</a>(<span class="stringliteral">&#39;Expecting value&#39;</span>, string, idx)</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        <span class="keywordflow">try</span>:</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;            <span class="keywordflow">return</span> _scan_once(string, idx)</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;        <span class="keywordflow">finally</span>:</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;            memo.clear()</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160; </div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    <span class="keywordflow">return</span> scan_once</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160; </div>
<div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#a8bbfe764a7cefe0ec4bff3977d0b6b67">   85</a></span>&#160;make_scanner = c_make_scanner <span class="keywordflow">or</span> py_make_scanner</div>
</div><!-- fragment --></div><!-- contents -->
<div class="ttc" id="anamespaceaestate_1_1ajson_1_1sim_1_1scanner_html_a77fc0c8e3170a8941797e63c0d559147"><div class="ttname"><a href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#a77fc0c8e3170a8941797e63c0d559147">aestate.ajson.sim.scanner.py_make_scanner</a></div><div class="ttdeci">def py_make_scanner(context)</div><div class="ttdef"><b>Definition:</b> <a href="scanner_8py_source.html#l00020">scanner.py:20</a></div></div>
<div class="ttc" id="anamespaceaestate_1_1ajson_1_1sim_1_1scanner_html_ae8f9e194f9bfc40954802c8d79a3de01"><div class="ttname"><a href="namespaceaestate_1_1ajson_1_1sim_1_1scanner.html#ae8f9e194f9bfc40954802c8d79a3de01">aestate.ajson.sim.scanner._import_c_make_scanner</a></div><div class="ttdeci">def _import_c_make_scanner()</div><div class="ttdef"><b>Definition:</b> <a href="scanner_8py_source.html#l00005">scanner.py:5</a></div></div>
<div class="ttc" id="aclassaestate_1_1ajson_1_1sim_1_1errors_1_1_j_s_o_n_decode_error_html"><div class="ttname"><a href="classaestate_1_1ajson_1_1sim_1_1errors_1_1_j_s_o_n_decode_error.html">aestate.ajson.sim.errors.JSONDecodeError</a></div><div class="ttdef"><b>Definition:</b> <a href="errors_8py_source.html#l00026">errors.py:26</a></div></div>
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